After some years we can summarize about some matter . What is true is :
- the 1791 code runs effect only if no further Denso's catographic DVD's been loaded in the player, as it would upgrade the firmware.
Wide explanation on the forum
There's been told that a the new cartographic DVD could be edited and burned so that no upgrading would be done. I tried and even if I'm able to have a valid "back up" duplicate DVD for damaging or loosing risk, my copy without that "LOADING.kiwi" isn't to be red by the player in the Nav System.
- For the above reasons the code is not valid on any further MY as they have newest catographic DVD.
What I don't know is if MY06 could support a certain patch ( http://www.disco3.co.uk//forum/topic7489.html ) that would re- enable "sat on navigation" feature.
Are there any news on the matter ?
P.S. I will report about my brake fluid changement. I substituted whole dot4 with dot5 Automec's SBF Silicone Brake Fluid on May 2012